Amazon's huge online booklist. Site also features music, DVDs, electronic, home and garden items, kitchen gadgets, etc.
You can now rent DVDs online and buy and sell items via the Amazon Marketplace (rather like Ebay).

Excellent city guides, adults and childrens non fiction books from Dorling Kindersley.
The company started up in 1974 and now publishes an extensive range of internationally acclaimed adult and children's titles. The UKs market leader in non-fiction, Dorling Kindersley creates books that offer comprehensive information and good design.

Penguin is a British icon and publishes over 6000 classic and much-loved books as well as new bestsellers including Jamie Oliver, Nick Hornby, Marian Keyes, plus the Rough Guides travel series, Penguin Classic and Puffin, Ladybird, Peter Rabbit and Flower Fairies books for children.

Waterstone’s, the leading specialist high street book retailer, has launched its own online retail website offering a wealth of books and book knowledge and access to expert booksellers from Waterstone’s stores around the country.